import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;


//通过这个 Servlet 生成一个 主页
@WebServlet("/index")
public class IndexServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 1. 先获取到当前对象的 会话
        HttpSession session = req.getSession(false);
        if (session == null) {
            resp.setContentType("text/html; charset=utf8");
            resp.getWriter().write("您当前尚未登陆!");
            return;
        }
        //2.从会话中拿用户信息
        String username = (String) session.getAttribute("username");
        String password = (String) session.getAttribute("password");
        Long loginTime = (Long) session.getAttribute("LoginTime");
        //3.生成页面, 将数据显示到页面上
        resp.setContentType("text/html; charset=utf8");
        String respBody = "欢迎你: " + username + "! 上次登录时间为: " + loginTime;
        resp.getWriter().write(respBody);
    }
}
